[25p-71B-1~13] 10.4 Spintronics in semiconductor, topological material, superconductor, and multiferroics

4:00 PM - 4:15 PM JST(7:00 AM - 7:15 AM UTC)English Presentation

[25p-71B-11] Enhancement of double-exchange interaction in a La_2/3Sr_1/3MnO₃ membrane released from epitaxial strain

〇Takahito Takeda¹, Takuma Arai¹, Kohei Yamagami², Le Duc Anh^1,3, Masaaki Tanaka^1,3,4, Masaki Kobayashi^1,3, Shinobu Ohya^1,3,4 (1.Dept of EEIS, The Univ. of Tokyo, 2.JASRI, 3.CSRN, The Univ. of Tokyo, 4.NanoQuine, The Univ. of Tokyo)

Keywords:

oxide,ferromagnet,synchrotron radiation spectroscopy

We have studied the mechanism of ferromagnetism enhancement in a La_2/3Sr_1/3MnO₃ (LSMO) membrane released from a SrTiO₃ (STO) substrate by using a water-dissolvable Sr₄Al₂O₇ buffer layer. The LSMO membrane exceeds the as-grown LSMO film in the magnetic moment and Curie temperature. By resonant photoemission spectroscopy (RPES) on the as-grown film and membrane of LSMO, we elucidate that the strain release from the STO substrate enhances the itineracy of the Mn 3d electrons via the p-d hybridization. The enhancement of the itineracy strengthens the double-exchange interaction, improving the ferromagnetism of LSMO.